My neighbor has a new Holly 3310 (750 cfm/vac secondary) carb that he bought in 1990. It has never been used, and is still wrapped in the original plastic (sealed) packaging. He wants $250, but make an offer. In fact, it might even be 780 cfm like the 3310s used to be--I don't remember when they changed.

I have a Holly marine 830 cfm DP--annodized blue. Needs to be rebuilt--$250.
I also have a Holly 750 cfm DP that needs to be rebuilt--$150.

Mark--"Sanger Pete"
(559) 917-1785